MESON Chess Problem Database

Problem Display
PID: 99853 (NqQRnBB1/bNr2pr1/Ppk3bR/3p1p2/P2p1P2/7P/8/1K6 w - - 0 1)

Firbas, Nandor

Magyar Sakkelet, 1983

NqQRnBB1/bNr2pr1/Ppk3bR/3p1p2/P2p1P2/7P/8/1K6

#2

12 + 12

14674 Attila Benedek - That's All 2007
6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Sd6
      • 2.Rxd6#
    • 1...Sf6
      • 2.Rd6#
    • 1...b5
      • 2.Sa5#
    • 1...f6
      • 2.Bxd5#
  • Tries
    • 1.Bxf7?
      • threat
        • 2.Bxd5#
      • 1...Sd6
        • 2.Rxd6#
      • 1...Sf6
        • 2.Rd6#
        • 2.Qe6#
      • 1...Rxf7!
    • 1.Rxg6+?
      • 1...Sd6
        • 2.Rgxd6#
        • 2.Rdxd6#
      • 1...Sf6
        • 2.Rxf6#
        • 2.Rd6#
      • 1...fxg6
        • 2.Bxd5#
      • 1...f6
        • 2.Bxd5#
      • 1...Rxg6!
    • 1.Qe6+?
      • 1...Sd6
        • 2.Rxd6#
        • 2.Qxd6#
      • 1...fxe6!
    • 1.Qxc7+?
      • 1...Sxc7
        • 2.Rd6#
      • 1...Qxc7!
  • Keys
    • 1.Qxf5!
      • threat
        • 2.Qc2#
      • 1...Qxd8
        • 2.Sxd8#
      • 1...Sd6
        • 2.Rxd6#
      • 1...Sf6
        • 2.Rd6#
      • 1...d3
        • 2.Qxd5#
      • 1...b5
        • 2.Sa5#
      • 1...f6
        • 2.Bxd5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
    • S(l);N_GUARD,N_SPINB(f)::R1(J),XS(l)
    • S(l);N_GUARD,N_SPINB(f)::R1(J)
    • P(d);N_GUARD::S(G)
    • P(i);N_SPINB(f),OGATE::B(L),XP(b)
  • Tries
    • Try
      • B(L);XP(i)
      • Threat
        • B(L),XP(b)
      • Vars
        • S(l);N_GUARD,N_SPINB(f)::R1(J),XS(l)
      • Refutation
        • R(j);XB(L)
    • Try
      • R(F);CHECK,XB(f)
      • Vars
        • P(i);OGATE,XR(F)::B(L),XP(b)
        • P(i);OGATE,P_SPINP(i)::B(L),XP(b)
      • Refutation
        • R(j);XR(F)
    • Try
      • Q(I);CHECK,N_PINB(f),N_PINR(h)
      • Refutation
        • P(i);XQ(I)
    • Try
      • Q(I);CHECK,XR(h)
      • Vars
        • S(l);XQ(I)::R1(J)
      • Refutation
        • Q(k);XQ(I)
  • Actual
    • Q(I);N_PINR(h),P_SPINQ(I),XP(c)
    • Threat
      • QAR(I)
    • Vars
      • Q(k);XR(J)::S(G),XQ(k)
      • S(l);N_GUARD,N_SPINB(f)::R1(J),XS(l)
      • S(l);N_GUARD,N_SPINB(f)::R1(J)
      • P(a);N_PINQ(I)::QAB1(I),XP(b)
      • P(d);N_GUARD::S(G)
      • P(i);N_SPINB(f),OGATE::B(L),XP(b)
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